DETER - In Security the line of defence is
only as strong as the weakest link

Understading customer's needs and developing
appropriate specifications so objects are achieved.

DETECT - Discover or catch intruders
or attackers in the performance of some act

D-Four will analyse threats to customer sites and suggest appropriate
counter-measures to ensure that site security is effective, proportional and economic.

DELAY - To impede the penetration into,
or progress of, intruders or attackers
around customer sites.

D-Four suggests effective physical measures to slow or repel intruders..

DEPLOY - To arrange in a position of
readiness, or to move strategically.

The combination of detection and delay measures specified by D-Four will provide
Response Fources with enough time to react against attacks or intrusions